package votorola.g.net; // Copyright 2010-2011, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE.

import java.io.*;
import java.net.*;
import votorola.g.lang.*;


/** URLConnection utilities.
  *
  *     @see <a href='http://stackoverflow.com/questions/2793150'
  *      >How to use java.net.URLConnection to fire and handle HTTP requests?</a>
  */
public @ThreadSafe final class URLConnectionX
{

    private URLConnectionX() {}



    /** Same as connector.{@linkplain URLConnection#connect() connect}(), but wraps any
      * ConnectException in a more informative IOException.
      */
    public static void connect( final URLConnection connector ) throws IOException
    {
        try { connector.connect(); }
        catch( ConnectException x )
        {
            throw new IOException( "Unable to reach URL " + connector.getURL(), x ); // add more info
        }
    }



    /** Sets the Cookie header in the connector preparatory to making a connection.  Reads
      * the existing {@linkplain URLConnection#getRequestProperties() request headers}, so
      * be sure to set them <em>before</em> calling.
      */
    public static void setRequestCookies( final URI uri, final URLConnection connector,
      final CookieHandler cookieHandler ) throws IOException
    {
        final String headerValue = CookieHandlerX.newRequestHeader( uri,
          connector.getRequestProperties(), cookieHandler );
        if( headerValue != null ) connector.setRequestProperty( "Cookie", headerValue );
    }


}